Payment processing companies like Bitpay are making it easier on the side of shops to take off Bitcoin. But as far as I can tell, most transactions in Bitcoin and other cryptocurrencies are bourse: le cours du bitcoin inter-currency speculative trades: US dollars pro Bitcoins, Bitcoins on the side of dollars, Chinese yuan repayment for Bitcoins, Bitcoins in the service of other cryptocurrencies, Dollars for Ripples, and so on.